* Using dd command and copy
@ 2012-10-19 12:07 chesschi
[not found] ` <50815062.50002@gmail.com>
0 siblings, 1 reply; 6+ messages in thread
From: chesschi @ 2012-10-19 12:07 UTC (permalink / raw)
To: cygwin
Hi all,
I am trying to write a script to do a "dd" to copy an image from a local
disk to a USB flash drive followed by copying some other files to the flash
drive.
e.g. if the flash drive is d and mapped to /dev/sdb
dd if=myfiles.iso of=/dev/sdb
cd myfolder
cp -rf */cygdrive/d
After dd and copy finishes, I eject the flash drive and reinsert to the USB
port. I found that some of the files are courrpted!
If I dd first, eject the USB flash drive then do the copying, it is okay.
Is there a way to automate this procedure without manually ejecting the
flash drive? Thank you.
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* Re: Using dd command and copy
[not found] ` <CAHHHhBab-_AiwLLGE69UT1yCY6WEP=AY_38vBGN2JcJmFmyHxQ@mail.gmail.com>
@ 2012-10-19 15:38 ` marco atzeri
2012-10-19 15:56 ` chesschi
0 siblings, 1 reply; 6+ messages in thread
From: marco atzeri @ 2012-10-19 15:38 UTC (permalink / raw)
To: cygwin
On 10/19/2012 5:28 PM, wing cheng wrote:
> Unfortunately it is not working.... there are still files corrupted. Any
> idea?
>
use the list please.
> On Fri, Oct 19, 2012 at 2:06 PM, marco atzeri wrote:
>
> On 10/19/2012 2:07 PM, chesschi wrote:
>
> Hi all,
>
> I am trying to write a script to do a "dd" to copy an image from
> a local
> disk to a USB flash drive followed by copying some other files
> to the flash
> drive.
>
> e.g. if the flash drive is d and mapped to /dev/sdb
> dd if=myfiles.iso of=/dev/sdb
> cd myfolder
> cp -rf */cygdrive/d
>
>
> After dd and copy finishes, I eject the flash drive and reinsert
> to the USB
> port. I found that some of the files are courrpted!
>
> If I dd first, eject the USB flash drive then do the copying, it
> is okay.
>
> Is there a way to automate this procedure without manually
> ejecting the
> flash drive? Thank you.
>
>
> have you tested sync instead of ejecting ?
>
>
>
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* Re: Using dd command and copy
2012-10-19 15:38 ` marco atzeri
@ 2012-10-19 15:56 ` chesschi
2012-10-19 16:06 ` marco atzeri
0 siblings, 1 reply; 6+ messages in thread
From: chesschi @ 2012-10-19 15:56 UTC (permalink / raw)
To: cygwin
I am new to this forum....
Marco, Thank you for your reply. I am sorry I replied you directly because I
saw you did not post your solution to the forum but the message go
straightly to my email......
By the way... my flash drive is an embedded drive 512MB like a small compact
flash and it needs an adapter to connect to the USB port. The filesystem is
FAT.
Also, I found that after using "dd" to copy the image to the flash drive,
the flash drive is still emtpy (I cannot see anything from the Windows
Explorer). But if I eject the flash drive and connect it back, I can saw the
contents.
Any idea how to solve the problem?
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* Re: Using dd command and copy
2012-10-19 15:56 ` chesschi
@ 2012-10-19 16:06 ` marco atzeri
2012-10-19 16:34 ` Corinna Vinschen
0 siblings, 1 reply; 6+ messages in thread
From: marco atzeri @ 2012-10-19 16:06 UTC (permalink / raw)
To: cygwin
On 10/19/2012 5:56 PM, chesschi wrote:
> I am new to this forum....
>
> Marco, Thank you for your reply. I am sorry I replied you directly because I
> saw you did not post your solution to the forum but the message go
> straightly to my email......
sorry, my fault. (PS: it is mailing list not a forum)
> By the way... my flash drive is an embedded drive 512MB like a small compact
> flash and it needs an adapter to connect to the USB port. The filesystem is
> FAT.
>
> Also, I found that after using "dd" to copy the image to the flash drive,
> the flash drive is still emtpy (I cannot see anything from the Windows
> Explorer). But if I eject the flash drive and connect it back, I can saw the
> contents.
>
> Any idea how to solve the problem?
it seems really that windows need to re-read the filesystem status.
eventually you can try sysinternals sync
http://technet.microsoft.com/en-us/sysinternals/bb897438
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* Re: Using dd command and copy
2012-10-19 16:06 ` marco atzeri
@ 2012-10-19 16:34 ` Corinna Vinschen
2012-10-22 11:31 ` chesschi
0 siblings, 1 reply; 6+ messages in thread
From: Corinna Vinschen @ 2012-10-19 16:34 UTC (permalink / raw)
To: cygwin
On Oct 19 18:06, marco atzeri wrote:
> On 10/19/2012 5:56 PM, chesschi wrote:
> >I am new to this forum....
> >
> >Marco, Thank you for your reply. I am sorry I replied you directly because I
> >saw you did not post your solution to the forum but the message go
> >straightly to my email......
>
> sorry, my fault. (PS: it is mailing list not a forum)
>
>
> >By the way... my flash drive is an embedded drive 512MB like a small compact
> >flash and it needs an adapter to connect to the USB port. The filesystem is
> >FAT.
> >
> >Also, I found that after using "dd" to copy the image to the flash drive,
> >the flash drive is still emtpy (I cannot see anything from the Windows
> >Explorer). But if I eject the flash drive and connect it back, I can saw the
> >contents.
> >
> >Any idea how to solve the problem?
>
>
> it seems really that windows need to re-read the filesystem status.
>
> eventually you can try sysinternals sync
Shouldn't diskpart do the trick? The diskpart command is "rescan"
Corinna
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Red Hat
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* Re: Using dd command and copy
2012-10-19 16:34 ` Corinna Vinschen
@ 2012-10-22 11:31 ` chesschi
0 siblings, 0 replies; 6+ messages in thread
From: chesschi @ 2012-10-22 11:31 UTC (permalink / raw)
To: cygwin
Corinna Vinschen-2 wrote
> Shouldn't diskpart do the trick? The diskpart command is "rescan"
Thanks Corinna.
I found that "rescan" is not working BUT "remove" followed by "assigned" is
working!
e.g.
select volume d
remove letter d
assign letter=d
One thing I found it is interesting is, when I use "remove", the drive is
still there in the Control Panel Disk Management but no letter is assigned.
If I then use "assign", the drive is assigned with letter and the drive is
no longer empty!
I tried "rescan" or "sync -r/-e" (marco suggested) that both attempt to
flush the filesystem, the drive is still empty after flushing.
Anyway, thanks a lot for your help!
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end of thread, other threads:[~2012-10-22 11:31 UTC | newest]
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2012-10-19 12:07 Using dd command and copy chesschi
[not found] ` <50815062.50002@gmail.com>
[not found] ` <CAHHHhBab-_AiwLLGE69UT1yCY6WEP=AY_38vBGN2JcJmFmyHxQ@mail.gmail.com>
2012-10-19 15:38 ` marco atzeri
2012-10-19 15:56 ` chesschi
2012-10-19 16:06 ` marco atzeri
2012-10-19 16:34 ` Corinna Vinschen
2012-10-22 11:31 ` chesschi
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